Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a5b11ed7e775ab7…

MALICIOUS

PDF

45.9 KB Created: 2021-05-16 09:01:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3ad54a4ae22e5c1ca5d98874a45c26ac SHA-1: acb113d8559e42f60ff3604c3867858cdb290b30 SHA-256: 3a5b11ed7e775ab7e2d76c1bcb6f236be38868b692a745dd5c159de49392b019
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a prominent link, suggesting a phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of lures like 'free spins' and 'hacks' indicates a social engineering tactic. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious workflow, likely leading to a second-stage download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/406889139/free-spins-on-coin-master-link-game-hack
    • https://www.neovision-group.net/images/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdf
    • https://www.neovision-group.net/images/spin-coin_GM406889139.pdf
    • https://www.neovision-group.net/images/roblox-hacks-2021_GM431946152.pdf
    • https://www.neovision-group.net/images/free-800-robux_GM431946152.pdf
    • https://www.neovision-group.net/images/get-free-food-in-coin-master_GM406889139.pdf
    • https://www.neovision-group.net/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • https://www.neovision-group.net/images/coin-master-free-spin-and-trading_GM406889139.pdf
    • https://www.neovision-group.net/images/robux-free-com_GM431946152.pdf
    • https://www.neovision-group.net/images/minecraft-free-reddit_GM479516143.pdf
    • https://www.neovision-group.net/images/free-roblox-hack_GM431946152.pdf
    • https://www.neovision-group.net/images/hack-robux_GM431946152.pdf
    • https://www.neovision-group.net/images/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdf
    • https://www.neovision-group.net/images/no-human-verification_GM431946152.pdf
    • https://www.neovision-group.net/images/como-hackear-coin-master_GM406889139.pdf
    • https://www.neovision-group.net/images/coin-master-real-free-spins_GM406889139.pdf
    • https://www.neovision-group.net/images/can-you-get-minecraft-windows-10-for-free_GM479516143.pdf
    • https://www.neovision-group.net/images/60-free-spins-on-coin-master_GM406889139.pdf
    • https://www.neovision-group.net/images/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdf
    • https://www.neovision-group.net/images/www-roblox-com-robux_GM431946152.pdf
    • https://www.neovision-group.net/images/coin-master-free-spins-link-2021-twitter_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e19.bin
5c88704fa6a1e465c534a30d1ff04e1b48c8efd491df8e78f02d5a34dafd0f57
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E19 25500 bytes
font_01_sfnt_off000087e9.bin
10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
pdf-font-stream PDF embedded font (sfnt) at offset 0x87E9 2880 bytes
font_02_sfnt_off000091d4.bin
892ebf3b86ae534fd3f474e2c239da2a9bb4dc91f8225dc09222a78aadec1336
pdf-font-stream PDF embedded font (sfnt) at offset 0x91D4 18056 bytes